Improvement in saw filing and setting machines



NOBLE G. ROSS, OF MITOHELLVILLE, IOWA.

IMPROVEMENT IN SAW FILING AND SETTING MACHINES.

Specification forming part of Letters Patent No. 142,585, datedSeptember 9, 1873; application filed I I January 27, 1873.

To all whom it may concern Be it known that I, NOBLE G. Ross, of

I Mitchellville, in the county of Polk and State anism, in the mannerhereinafter fully set forth.

Figure l of my drawing is a front elevation and miniature perspectiveview, illustrating the construction and operation of my invention. 7

A is the base or foot of the metal frame. It may be flat, with holes inthe ends to bolt'it on a bench, or it may have a shoulder and extenddownward, as indicated by dotted lines, so that it can be fastened in amortise or in a vise. a a a is a cast-metal frame, which may vary insize and also in design. I) b is a screwshaped file. Its diameter andlength, and the size and angle of the threads, and space between thethreads, may vary to suit various forms and sizes of saw-teeth. It ispivoted by a set-screw at the left end, and coupled with a shaft at itsright end. 0 c is the shaft. It has bearings in the side extension ofthe frame. 01 is a bevel-gear wheel, rigidly attached to the right endof the shaft, and matches a corresponding wheel attached to thecrank-handlef. The side extension of the frame inclines rearward farenough to bring the outside edge of the wheel 01 out of the way of thesaw, which must pass in a straight line with the file b b. g is anadjustable collar, with pins extending laterally, placed on the shaft 0c to perform the functions of a cam wheel in moving the hammer whichsets the saw-teeth. B is a hammer. The manner of connecting it isillustrated in Fig. 2. k k 70 is a rest, upon which the edge of the sawis held in contact with the screw-file. It is raised and lowered bymeans of set-screws in slots, and carries the anvil 1, upon which theteeth rest when struck by the hammer. m m are holders, in the form ofcasters, mounted upon hearings on the frame, with nuts to raise andlower, and set-screws to lock them. The saw passes between them, and iskept in proper position by them, as represented by the section of thesaw-blade held between the wheels of the holders.

Fig. 2 illustrates the manner of forming and mounting the hammer B.

O O is a metal frame, secured to the rear side and inside of the frame aa a by means of the screw n. D is the elbow of the arm I, which carriesthe hammer B, and is pivoted in the frame 0 O.- 0 is a crooked finger orprojection from the part D, and engages the collar or cam-wheel g. Acoil-spring or its equivalent is connected with the arm F and frame 0 O,and serves to make the hammer strike and to regulate its force. Turning.the crank causes the cam g to lift the finger 0, and thereby the hammerB. The time and number of the strokes of the hammer can be regulated andadapted to different saws by the number of pins in the collar orcam-wheel g. 19 is a spring that causes the hammer B to rise instantlyafter striking.

To operate my machine, placethe saw-blade between the holders m m, insuch a manner that the teeth will fit against the screw-file b I). Turnthe crank, and allow the screw-file to move the saw. Every revolution ofthe file will sharpen the teeth on one side, and at the same time movethe saw, so that every alternate tooth is brought under the strikinghammer. When a right-hand screw-file is first used to finish one side, aleft-hand screw-file must be substituted to file and set the other side.

I claim as my invention- The combined saw filing and setting machinecomposed of the frame a a a, the file b b, the shaft 0 0, the cam g, thedriving mechanism df, the adjustable rest k k, the holders m m, and thehammer B, substantially as described, and for the purposes specified.

. NOBLE G. BOSS.

Witnesses:

A. J. SHUNK, S. HAnnnn'r.

